Mapped drives may fail to reconnect after starting and logging onto a Windows device.

Symptoms include:

In File Explorer, a red "X" appears on the mapped network drives.

Mapped network drives show as "Unavailable"when you run the net use command from a command prompt.

In the notification area, a notification displays, "Could not reconnect all network drives."

Workaround: See KB4471218 for workaround scripts to automatically reconnect a mapped network drive when you log on to the device.

Next Steps: Microsoft is working on a resolution and will provide updates in the 2019 timeframe.

Upgrade block in place

Microsoft and Trend Micro have identified a compatibility issue with Trend Micro’s OfficeScan and Worry-Free Business Security software when attempting to update to Windows 10, version 1809.

To ensure a seamless update experience, we are blocking devices running the affected business endpoint security products from being offered Windows 10, version 1809, until a specific Trend Micro Critical Patch (CP) is applied.

Next Steps: For information on when critical patches will be available for these products, please refer to Trend Micro’s Business Support Portal.

After updating to Window 10, version 1809, Microsoft Edge tabs may stop working when a device is configured with AMD Radeon HD2000 or HD4000 series video cards.

Customers may get the following error code: "INVALID_POINTER_READ_c0000005_atidxx64.dll".

Some users may also experience performance issues with the lock screen or the ShellExperienceHost. (The lock screen hosts widgets, and the ShellExperienceHost is responsible for assorted shell functionality).

Workaround: To ensure a seamless update experience, we are blocking devices with AMD Radeon HD2000 and HD4000 series graphics processors from being offered Window 10, version 1809.

Next Steps: Microsoft is investigating this issue.

All of the issues list November 14 as the date, and the versions of Windows affected are 1809, Server 1809, and Server 2019.

It might make sense for some users to hold off on the Windows 10 October 2018 Update for now. As can often be the case with new feature updates, there are some bugs to iron out, and those will be fixed with cumulative updates in the coming months.